光こう化か学がくスモッグ

noun

photochemical smog

Technical term for air pollution caused by chemical reactions between sunlight and pollutants like nitrogen oxides and hydrocarbons.

• 夏なつの日にっ中ちゅうは光こう化か学がくスモッグに注ちゅう意いが必ひつ要ようです。

  Be careful of photochemical smog during summer days.

• 光こう化か学がくスモッグの発はっ生せいで、屋おく外がい活かつ動どうが制せい限げんされた。

  Outdoor activities were restricted due to the occurrence of photochemical smog.